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4.3 TROUBLESHOOTING GUIDE
In general, possible trouble is classified in two kinds.
The one is called Starting Failure which is caused from an electrical defect, and the other is ineffective Air
Conditioning caused by a defect in the refrigeration circuit and/or improper application.
Unit runs but poor cooling.
Ineffective Cooling
Check outdoor coil
(heat exchanger) & the fan
operation.
Check for gas leakage.
Repair gas leak.
Replace unit if the
unit is beyond repair.
Satisfactory operation with
temperature difference of
inlet & outlet air ;
44~50°F(7~10°C)
Check heat load
increase.
Clean condenser.
Not on separate circuit.
Check inside gas
pressure.
Adjustment of refrigerant
charge.
Malfunction of compressor.
Replacement of
compressor.
Check cold air circulation
for smooth flow.
Dirty indoor coil
(Heat exchanger)
Correct above problem
Check clogging in refrigera-
tion system.
Repair clogging in refrigera-
tion system.
Obstruction at air outlet
Clogged air filter
Malfunction of fan